As per a Chinese railway expert the Chinese-made subway cars might spy on the US politicians and lead to delay in progress in US rail transportation.
Addressing concerns the Massachusetts Bay Transportation Authority said that it has robust controls to maintain the security of its system and that the subway cars made by a Chinese rolling stock producer can be used for espionage.
Earlier a newspaper did a story that raised concerns regarding subway cars made by State-owned China Railway Rolling Stock Corp might conduct a surveillance of the US officials when they ride the liens.
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